Printing cylinder



Sept. 2 1924. 1,506,859

M. OWEN PRINTING CYLINDER A7 Zar/rey atented Sept. 2, 1924.

. ivrA'Loomlt oW'nN', er nonnen, ENGLAND? fR/wrme CY'BINDER, AQ i Appncatitn med February 12, 1924. sanarrra-f692,408:v

To all Iwhom t may concern:

. Be it ,known that I-MALCOLM= OWEN, a subject of the King otf- Great Britain', residingat London, England, have invented c ertain new and useful Impro vei'nents imprinting. Cylinders, of which. the following. is a specification; Y Y

This invention relates to printing cylinders .of the kind having a gapfin.l Whiclithe ends of the printing sheet are fastened,

VIn fitting; sheets to such; cylinders one end ofi the sheet. (hereafter. referred to: as the leading end) is anchored in the'gap;4 the sheetv is thenl Wrapped around the cylinder and then the other end. of.; the sheet (hereafter referredk toV as. the free end) issecured Within thegap.

A rnain. object of. thepresent invention is to provide 'an-improved constructionv for securing the: free end of the sheet, 5a further object. to provide ani easily removable: covering for the securing 1neans-, suoh: covering substantially filling the gap soV that a practically Vcontinuous. surface for the cylinder is obtained, and another object kistoy conA` struct a cylinder with iny improved meansy for securing, the free end ofthe sheet and a removable capping piece which` fills the gap, the capping piece heingmade up in interlocking sections so that: assembling. can loe efected from each end ofthe cylinder. A further object is to construct the hook inernl hersy for: usein a cylinder havinganchorfing lugs for the leading n end of the sheet fornied ontheivallrof the gap, so that thehoolr ine-inbers assure the retention of the sheet on the luv rs.

lnotheroloject is to construct such a: cylinder. with removahleends to facilitate positioning-a hed'plate inthe gap, the ends heinginzthe forni of discs and slotted. to permit the sectionsl of thecapping piece being slid into position, the slotsheing, finally, fitted bythe ends .ofthe Vouter sections, the discs 'being recessed. anniilarly When ink Wellsare required at the lends of the cylinder. A preferred construction ofy the present inventionV is'irllustrate'd by Way of example in the accompanying draWingsn-Whicha- Fig. l isa longitudinal'elevation 'of the cylinder partly in section.; Y

Fig. 2 isa vertical sectionfon'the'line 2-2 ,offF ig .wl,ronly; so much of'the cylinder' loeingishoW-nla's is necessary; i

. ,riga is and'- an end-elevation of; the.cylindien;

" Fig. shows in ,planl an-foiiter` section of the;capp1ng.;p1ece, the cross hatche'dportion indicating the sh'apemo'f` thed section 5' While j' Flgz isaplan ofoneof thehook inein- 'oers.=V v i i Referring rst to Figs. l and 2" theleadin'g end of the'gsheet 9Y isattachedto theg'c'ylinder l5 by reason of itsreinforcedr endbeing hitched over th'elugs 8 on one. Wall*y of-the cylinder' gap. .The sheet is:` then! Wrapped around; the `cylinder, and the free-end t folded the gap and are preferably? entirely separate and independent.

oven the edge of the gap andi turned down rheeaing of each hook membermyfb i carried outlay: boring."A it radiallyto the ycylinder torelceive-a fixing screw fvfhichy entersa threaded hole in--eithe'ry thebedplate lO-in-the gapv or in thecylinde'r, that is,fthe botto-in of the gap, and:y either construction is intended to` come Withinithe terni` fixed to the' bed of the. gap.

Itwillloe observed. that `With this construct-L tion a Vscrew driver can bentgiflizedto-xrdf tate the Xing screws from the tbpof thecgapv irrorder 'to assureafinal tightenin of theV sheet on` the cylinder,` it beingnn rstood that the sheet Will be perforated` or'rsl'otted so tha-t the lngsfl canvpassthrough-Ythe loody of the sheet as indicated inV Fig.v2,-.the'she`et being of course also perforated attheleading end in order to engage overtheV lugs 8'.

The sheet having-been secured in the gap the latter may then be iilledin hy a capping Y piece which, according to the presentanvention, comprises three interlockingv sections, indicated by the references 12,18, and 14, the aligned convex` faces of which-are such as'to complete the circleofthejcylin dricalsurface ofthe; cylinder The-central section is securedv inA placefloy-screvvs'16,17

passing through; reduced ends 1S and 19,'

which are obtained by ralol'eting the top of each end of-th'e central section;V Beyoid each ralobet is formed apin,=-the pins-being indicated in Fig. l by thev numerals 20-'and 21; The outer sections are thenslidzintothe gap? from each end untilfrsockets 22 and-i2?) have passedliovery thepinsf201and-z21=respec tively, thereby forming a joint between the outer and inner sections. Then in order to prevent radial movement of the outer ends oi' the outer sections they are fixed by means of screws 26 to the cylinder. Y

In order to assure that there is no axial movement ot' the outer sections relatively to the cylinder and further also to completelyill the gap, that is, to cover the xing screws of the central section, each outer section is formed beyond its socket with a tongue which, when the outer sections are in position, fits into the rabbet covering the fixing screw, that is,vtits tightly against the shoulder formed by rabbetmg the end of the central section. The tongues of the sections 12 and 14 are respectively indicated by the references 30 and 31 in the drawings. Y It will be noticed that each ot the sections 12, 13 and 14 is recessed on its underside so as to bridge the hooked members 2 in order to be lindependent of them, that is, so that the sections can rest on the bed ot' the gap, `which as shown may be constituted by the bed plate 10 disposed within the gap.

Each end of the cylinder is formed with an annular well 27 for collecting ink escapingfrom the cylindrical surface when overrunning the edges of the sheet, the ink being easily removable from its Wells.

When a bed plate 10 is used as illustrated inthe drawings, the cylinder gap is rst formed and the bed plate set, and fixed by screws 82 to the cylinder; then the cylinder ends which are constituted by separate discs 24 and 25 are xed by screws 28 concentrically with the cylinder, the said discs including the annular well. These discs are slotted from the periphery towards the centre so as to extend the bed of the gap, that is, the bottom of the slot will be level with the top-of the bed plate 10, and consequently the slot in each disc will be completely iilled by the outer end of the respective section 12 or 14, the outer end ofthe section being also recessed on the top in order to register with theicontour of the well ormedin the discs.

In such a construction the screws 26 are utilized to x the outer ends of the outer sections to the said discs.

Referring to Figs. 2, 3 and 4, it will be noticed that the convex surface oi the sec# tions of the cappingpiece are undercut, as indicated at 29, so far as they are within the width et the printing sheet. The reason of this is that the folded over end of the sheet is inclined towards the centre of the gap and therefore `clearance has to be provided. This overlapping extends beyond Ythe sheet on each side but as regards theV outer ends of the outer sections, these are only of a width' to fit the slots and the discs and have not an undercut portion as will be realized on consideration; of ligs.V 3 and 4.

Although in the constructions shown I have indicated a cylinder with lugs 8 this is not an essential to the invention as any means can be utilized for securing the lead-V ing end of the sheet, but where lugs 8 are provided in the cylinder as in the construction shown the backs of the hook members 2 will be recessed, as indicated at 33 inFig.V

5 so as to partly straddle the lugs and assure the retention of the leading end ot the sheet over them.

l' claim 1. A printing cylinder having a gap, a plurality of hook members spaced apart in the gap, and means for securing said members to the bed of the gap, whereby the vfree end of a sheet, wrapped around the cylinder with its leading end secured in the gap, may be engaged and held down towards the bed of the gap to finally secure the sheet on the cylinder.

2. A printing cylinder having a gap, a plurality of independent hook members spaced apart in the gap, and means for securing said members to the bed of the gap,

whereby the free end of a sheet, wrapped around the cylinder with its leading endfsecured in the gap', may be engaged and held down towards the bed of the gap to linally secure the sheet on the cylinder.

3. A printing cylinder having a gap, a

plurality of independent hook members spaced apart in the gap, andV bored through from the top radially to the cylinder, and a lixing screw for each hook member passing through the said bore and taking into a threaded hole in the bed of the gap, whereby the hook members may each be fixed to the bed o1 the gap by driving the screws from the top of the gap to engage the free end of a sheet, wrapped around the cylinder with its leading end secured in the gap, to finally secure the sheet on the cylinder.

4. A printing cylinder having a gap, a plurality of hook members spaced apart in the gap, means for securing said members to the bed of the gap, whereby the tree end of a sheet, wrapped around the cylinder with its leading end securedV in the gap, may be engaged and held down towards the bed of llO the gap to finally secureV the sheet on the meeste securing the fouter-l ends lof the two` outer sections against radialmovement relatively to Vthe cylinder, a pin at each end yof the central Section, and asocket at the bottom of each inner end of 4the outer sections formed to engage with the pins of the cen-l tral section.

6,. A` printing cylinder having a gap, va` plurality of hook members spaced apart in the gap, means for securing said members to the bed of the gap, whereby the free end ofi a sheet, wrapped around the cylinder with its leading end secured in the gap, may be engaged and held down towards the bed of thegap tol nally secure the sheet 'on the cylinder, a capping piece disposed; over the hook members to substantially l'jll the gap, said capping piece including three interlocking sections, the top of each end of the central section being rabbeted, fixing means for theV central section passing through the reduced ends formed by rabbeting to the bed of the gap,'a pin on said central section beyondV each rabbet, a socket at the bottom of each inner end of-the'outer section formed to pass over said pins 'of the central section, ay tongue at the top of each outersection beyond? each socket formed to it the respective rabbet and cover the fixing means of the central? section7 and means forl securing the. outer ends of the outer Vsection against radial movement `rela-V tively to the cylinder. Y

' 7. A printing cylinder having a gap, a plurality of hook members spaced apart in the gap, meansfor securing saidf members tothe bed of the gap,whereby the freey end oiia sheet, wrapped around 'the' cylinder withits leading end secured in the gap, may be engaged and held down towards'the bed ot' the gap to finallyV secure the sheet on the cylinder, anda'cappingpiece disposedover the Ahook membersto substantially iill the gap, said capping piece including' three interlocking sections, each recessed on. the underside to vbridge the hook members, means -for securing the central section in the cylinder gap, and means for securing the cuter ends of the two outer sections against radial and axial movement relatively to the cylinder. y

8. A printing cylinder having a gap, a plurality of independent hook members spaced apart in the gap, means for securing said members to the bed of the gap, whereby the free end of a sheet, wrapped around the cylinder with'its leadino end secured in the gap, may `be engaged and held down'towards the bedr of the gap to finally secure the sheet on the cylinder, and

a capping piece resting on the bed ci the .gap and disposed over the hook members to substantially lill `thefgap, said capping piece including threeinterlocking sections, each recessed on/the underside to bridge the hool memberson the bed of the gap, means for securing the central section onthe bed of the gap, and means forY securing the outerend ofthe two outer sections against aXial movement or movement away from the bed of the gap. y 9. A printing cylinder havinga gap, a plurality of independent hook members spaced apart in the gap, means for securing said members to the bed of the gap lfor the purpose set fort-h, a capping piece resting on the bed of' the gap and disposed over the hook members to substantially fill the gap, said capping piece including three interlocking sections, each recessed on the underside to bridge -the yhook members. the top of each end of the central section being rab' beted, tix-ing means for the central section passing through the reduced ends formed by rabbet-ingl 'to the bed of the gap, a pin on said central section-beyond each rabbet, a socket at the bottom of each inner end of the'outer section formed to pass'over said pins 'ofthe-central section, a tongue-at the top-of each outer section beyond each socket formed to nt the respective rabbet and cover the lining means: of the central section, and means for securing the outer ends of the outer sections against radial movement relatively to the cylinder. t

' 10.A A printing. cylinder liav1n'g'a-gap, a

plurality .of independent hook members spaced apart in the. gap, meansforsecuring said members to the bed ofthe gap for: the purpose setforth a. capping 'piece resting 'en thetbed ofthe gap and Vdisposed;overthe` hook'm-embers to substantially fillthe gap',

said capping piece including 'threeinterloclnngsections,each recessed on the under.-

side Vto bridge the-hook members7 thetop of each rend of the central Vsection being rabbeted, iixing screws for the central section passing through the reduced ends formed byrabbeting to the bed ofthe gap, a pin onsaid central section beyond ea'ch'rabbet, a socket at the bottomro'f' each innen endof the cuter ysections'formed to Apass over said pins, a tongue at the top of each outer section beyond each socket formed toV fit the respective rabbet and cover the fixing' screws of the central section, and iXing screws passing through the outer ends of the outer sections taking into the bed of thegap to secure said outer ends against radial movement relatively to the cylinder.

11. A printing cylinder having a gap, a

disc concentric Vwith the cylinder removably tted at each 'endthereon slotted in veXtension of the gap, an annular Vwell on each disc. a plurality of hook members spaced apart in the gap, means for securing said members to the bed of the gap for the purpose set forth, and a capping piece disposed over the hook members to substantially lill the gap, said capping piece including three interlocking' sections. means for securing the central section Vin the cylinder gap, and means for securing the outer ends of the two outer sections against radial and axial movement relatively to the cylinder, the outer ends of the outer sections litt-ing the slcs of the discs and being recessed on the top to register with the respective annular well.

12. A printing cylinder having a gap, a bed plate in the gap, means for securing the bed plate to said cylinder, a disc concentric with the cylinder removably fitted at each end thereof and slotted from the periphery7 towards its centre to extend the bed of the gap, a plurality of hookmembers spaced apart on said bed plate, means for securing` said members on the bed plate for the purpose setforth. and a capping piece including three interlocking sections, means for se- 1uring the central section on the bed plate, and means for securing the outer ends of the two outer sections in the slots of the disc, the said outer ends filling the slots and being recessed on the top to register with the respective annular well.

13. A printing cylinder having a gap, a bed plate in the gap, means for securing the bed plate to said cylinder, a disc concentric with the cylinder removably fitted at each end thereof and slotted from the periphery towards its centre to extend the bed of the gap, a plurality of independent hook members spaced apart on said bed plate, means for securing said members on the bed plate for the purpose set forth, a capping piece resting onr the bed plate and disposed over the hook members to substantially lill the gap, said capping piece including three interlocking sections, each recessed on the underside to bridge the hook members, the top of each end of the central section being rabbeted, fixing screws for the central section passing through the reduced ends formed by rabbeting to the bed of the gap, a pin on said central section beyond each rabbet, a socket at the bottom of each inner end of the. outer sections formed to pass' over said pins, a tongue at the top of each outer section beyond each socket formed to lit the respective rabbet and cover the fixing screws of the central section, and xing screws for securing the outer ends of the two outer sections in the respective slots of the discs, the saidouter ends filling the Yslots and being recessed -on the top to register with the respective annular well.

Y 14. A. printingcylinder having a gap, a bed platel in the gap, means for securingthe bed plate to said cylinder, a disc con-` centric with the cylinder removably fitted `at each end thereof and slotted from the periph# ery ltowards its centre to extend the bed of the gap, a plurality of independent hook members spaced apart on the bed plate and bored through fromthe top radially to the cylinder, va fixing screwfor each hook member passing through said bore and taking into the bed plate for the purpose set forth, a capping piece resting on the Vbed Vplate and disposed over the hook members tosubstantially fill' the gap, said capping piece including three interlocking sections, each recessed on the underside 'to bridge the] hook members, the top of each end of the central section being rabbeted, fixing screws for the central. section passing through the reduced ends formed by rabbeting to the bed ofthe gap, a pin on said central section beyond each rabbet, asocket at the bottom of eachl inner endV of Vthe outer sections formed to pass over said pins, a tonfrue at the top of each outer section beyond each socket formed to fit the respective rabbet and `cover the fixing screws of the central section, andcfixing screws for securing the outer ends of the two outer sections in the respective slots of the discs, the said outer ends filling the slots and being recessed on the top to register with the respective annular well.

15. The combinationv with independent hook members, each bored for the reception of a fixing screw and a capping piece comprising three sections interlocked by pin and socket joints and each recessed to bridge a hook member substantially las set forth for fitting to a printingcylinder havingva Oap. f Y c b In testimony whereof I affix my signature.

MALCOLM OWEN. 

